U can put an a at the beginning of the sentence which will make it sound better
The adjective clause in this sentence is 'who has read thousands of books'. It is an appositive, separated from the rest of the text by commas, and has an adjectival meaning - it modifies the noun, Anthony.
A. On the bust of the Pallas
The answer is C. We were able to see the planet Saturn. It is visible Through a telescope.
